Valve-grinder



l c. H1 AND H. w. VIEBHOCK.V

1 VALVE GRINDER. APPucATloN FILED FEB. 2 1921.

Famed Nov. 15, 1921.

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C. H. AND H. W. VIEBROCK. VLVE GRINDEH.

APPLICATION FILED FEB. 2. I92I.

Patented Nw 15;, 1921.

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CARL H. VEBROCIK .A 'ND HENRY W. VIEBROCK, OF DOUGLAS, WASHINGTON.

VALVE-GRIND'ER.

Specification of Letters Patent. Pagntd NOV, 15 1921n Application ledFebruary 2, 1921. Serial No. 441,330.

T 0 aZZ w hom. t may concern Be it known that we, CARL H. VIEBROGK andHENRY W. Vrecnook, citizens of the United States, residinff at Douglas,in the county of Douglas andttate of Washington, have invented certainnew and useful Improvements in Valve-Grinders; and we do hereby declarethe following to beA a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention provides a tool designed specically for use in grindingthe valves of internal combustion engines, but which is susceptible ofgeneral application in grinding of valves to their seats.

rlhe invention aims to provide a valve grinding tool which is readilyadjustable within certain limits to a variety of valves and capable ofbeing easily and effectively secured in the adjusted position.

rllhe invention furthermore aims to provide a tool of the characteraforesaid which will maintain close engagement with the valve afterbeing. fitted thereto without slipping, even though the shank of thetool should be inclined from the perpendicular, provision againstslipping being obviated by the inter-position of a universal jointbetween the head of the tool and its shank.

Other objects and advantagesA will be apparent and suggest themselves asthe nature of the invention is understood.

While the drawings illustrate an embodiment of the invention it is to beunderstood that in adapting the same to meet different conditions andrequirements, various changes in the form, proportion and minor detailsof construction may be resorted to without departing from the nature ofthe invention.

Referring to the accompanying drawings forming apart of thespecification,

Figure l is a view in elevationof a valve grinding tool embodying theinvention,

Fig. 2 is a vertical central section of the head portion of the tool,the outer part of the stem being in full,

Fig. 3 is a horizontal section on the line 3 3 of Fig. 2,

Fig. 4 is a detail perspective view of the finger piece,

Fig. 5 is a `detail'perspective view of the nut,

Fig. 6 isa perspective view of the retainer,

Fig. 7 is a detail perspective view of theV nated in the several viewsof the drawings by like reference characters.

The tool comprises a stem and a head, the latter be'mg connected withthe stem by means of a universal joint. The stem is designated by thenumeral l and its outer. end is constructed to be fitted to a brace orsimilar operating tool. The universal joint comprises a socket kf2 and aglobose member g or head 3, the socket being of square form and themember .3 vhaving 4its four sides curved to conform to elements of asphere. An equatorial section of the member 3 con forms to the squareoutline of the socket 2, hence rotation of the latter effectscorresponding movement of the part 3, the curved sides of the latterproviding for the universal movement whereby to retain the head of thetool in' close engagement with the valve, even though the stern l shouldincline in any direction from the perpendicular. The socket 2 is pinnedor otherwise secured to the stem l to rotate therewith. `'llhe globosehead or member 3 is retained within the socket 2 by means" of inturnedears 4: at the lower edges of the side walls of the socket. The shank 5ofthe globose head or member 3 is formed at its lower end with an outerflange 6 and is externally screw threaded, as indicated at 7 to receivea coperating nut 8. The shank 5 is detachably connected with the 4member3 and may be pinned or otherwise secured thereto. formed at its lowerend with an outer flange 9 and at its upper end with lateral extensionslO. A. butterfly or winged finger Vpiece 11 cooperates with the nut 8 toeffect rotation thereof on the shank 5 to clamp or release the valvegrips as may be required.

The nutV 8 is' Arretainer 12 is'loosely mounted upon the nut 8 betweenthe flange V9 and lateral extensions 10 thereof. The central portion ofthe retainer l12 is raised, as. indicated at 13, to receive the flange 9Vof the nut 8. Diametrical openings 14 are formed Einthe flange 6 of theshank 5 to receive journals 15 of valve grips 16, the. latter being ofsimi lar formation and consisting of sectorshaped plates disposedagainst the lower face of the flange or head 6 of the shank 5. Studs vorpins 17- projeet from'the ends of the valve grips 16 and are adapted toenter the openings of the valve to be ground. The studs or pins `17 areadapted tobe adjusted to a greater or less distance apart to correspondwith the varying positions of the openings in different types ofvalves.V

Toset the'valve grips an'adjuster is previded. This adjuster consists ofa disk or plate 18 having a rim 19 at its outer edge to inclose thevalve grips, flange 6 and retainer 12. The upper edge of the rim 19 isinturned, as shownmost clearly in Fig. 2, to retain the parts inassembled position. Arcuate slots 21 are formed in the disk or plate 18to receive the studs or pins 17. These slots have an opposed eccentricarrangement, as shownl most clearly in Fig. 9, whereby to effect asimultaneous like movement of the valve grips when the adjuster isoperated, said adjuster operating similar to the scroll of a universalchuck.

' When the parts are assembled-they assume the relative positionindicated most clearly in Fig. 2. When .the finger piece 11 is loosenedtherim 19 of the adjuster may begrippe'd and rotated in one directionorthe other to space the studs or pins 17 to agree with the distanceapart ofthe openings inthe valve tobeground. After the tool has beenset, the vfinger piece 11 is turned to effect clamping of thevalve grips16, this being accomplished by 4a binding of the part 16 between theplate 18 and the flange or head 6 of the shank 5. Relative inwardmovementvof the nut 8 effects a correspondingmovement of the retainer 12by engagement of the flange 9 therewith. The outer portion of theretainer V1,2 engaging the inturned edge 2O ofV thek adjuster, causesthe latter to move inl Iward `and thereby clamp the valve grips in themanner stated.

' It will be understood from the foregoing that a tool constructed inaccordance with the present invention is susceptible of universalapplication because of theV adjust- .ment of the studs or pins 17 whichenter the openings of the valve in a manner well understood. The toolmay be readily and conveniently set and when adjusted is made secure bytightening the nut 8 which may be easily effected through theinstrumentalityofthe linger piece 11. When the tool is in operation, itis prevented Vfrom slipdiculait vlength of the stem, the head of thetool maintaining close engagement with the valve, even though-the stemshould incline slightly in anydirection from the perpen- It should bestated that the pins or studs 17 may be of any desired formation vbestadapted for the particular work in hand.'

They may be flared, straight or of any required outline. 'j

Vhat is claimed is:

1. vA valve `grinding tool comprising a stem, a head including a shank,a square socket in-one of said parts, and a coperating member on theremaining part and of square form in equatorial section to conform tothe socket and having its four'outer surfacesV coinciding with elementsof a sphere.

2. A valve grinding tool comprising a stem, a head including a shank, asquare socket on one of said parts, and having inturned ears at theouter edges of its inclos- -ing walls. and a globose vhead connectedgrips, an-adjuster for setting the valve grips,

and-meansl for Aclamping the valve grips in the adjusted position.

et. A valve grinding tool embodying complemental pivotedvalvegripshaving olfstanding valve engaging studs, an adjuster forsetting the valve grips by a pivotal movement, and means for clampingthe valve grips in the adjusted position.

5. In a valve grinding tool, valve'grips embodying Vplates provided uponone side with journals and having valve engaging studs upon the oppositeside, an adjuster for setting the valve Vgrips by a pivotal movement,and means for clamping the "valve grips in the required adjustedposition.

6. ln a valve grinding tool, a shank provided with a head, valve gripsrelatively adjustable on thehead, an adjuster for setting the valvegrips, and anut threaded on the shank and adapted to clamp the valvegrips in the adjusted position. Y

7 .ln a valve'grinding tool, a shank having a head, valve* gripsrelatively adjustable on the head, an adjuster for setting the valvegrips, a nut threaded on said shank, and means intermediate said nutland adjuster to effect a clamping of the valve grips in the requiredadjusted position. j

8. ln a valve grinding tool, ashank having a head, valvegrips,anadjuster for setting the valve grips, a nut having screw threadconnection with the shank, a retainer in coperative relation with thenut and adisezaeeo ljuster, a finger piece rotatable with the nut shankhaving an outer flange, movable valve grips having outwardly extendingstuds, a rotatable adjuster having opposed eccentrically arrangedarcuate slots for the reception of said studs, and a nut on the shank tosecure the valve grips in adjusted position by means of a clampingaction.

l0. In a tool of the character specified, a shank having an outstandingflange, opposed valve vrips pivotally connected to said flange, a rotaryadjuster having opposed arcuate shaped slots eccentrically arranged toeffect adjustment of the valve grips, an outwardly flanged nut on theshank, and cooperating means between said nut and adjuster to effect aclamping of the valve grips.

l1. ln a tool of the character specified, a shank, pivoted valve gripshaving outwardly extending studs, a rotary adjuster having opposedarcuate slots eccentrically arranged and receiving the said outwardlyextending studs, a nut on the shank, and a retainer between said nut andadjuster to effect a clamping action of the latter.

12. ln a tool of the character specified, a

shank, pivoted valve grips, a rotary adjuster for setting the valvegrips, a nut on the shank and having lateral extensions, a retainerbetween thenut and adjuster, and a finger piece loose on the nut andengaging the lateral extensions thereof to effect rotation of the nutand a positive clamping of the valve grips.

13. In a tool of the character specified, a shank having an outerflange, valve grips having pivotal connection with said flange, a rotaryadjuster having opposed arcuate slots eccentrically arranged, a nut onsaid shank having an outer flange and lateral extensions, a retainerbetween said nut and adjuster and engaged by portions thereof, and afinger piece lose on the nut and engaged by the lateral extensionsthereof.

1l. A. tool of the character specified coinprising a stem, a squaresocket at one end of the stem, an outwardly flanged shank having aglobose head at one end coperating with the said socket to form auniversal joint between the stem and shank, valve grips having pivotalconnection with the outwardly extending flange of the shank, a rotaryadjuster having opposed arcuate slots eccentrically arranged, anoutwardly flanged nut on the shank and having lateral extensions, aretainer between the nut and adjuster and engaging portions thereof, anda finger piece loose on the nut and engaging the lateral extensionsthereof.

In testimony whereof we affix our signatures in presence of twowitnesses.

CARL H. VIEBROCK. HENRY W. VIEBROCK.

l/Vitnesses M. E. Lins, RANDALL S. CASE.

